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10 Best Caulk for Showers and Bathtubs in 2021

Your showers and bathtubs are places where you must have caulk to stop moisture. The caulk stops the water from the shower from seeping behind tiles and tub surrounds and causing problems in the future.

Caulk also stops mold and mildew from growing and creating an unhealthy and unsightly area around your shower stall.

The best caulk for shower surround will be a silicone caulk that stays flexible and does not dry and crumble over the years. You will find these sealants in paintable and non-paintable varieties.

Sashco Lexel Flexible Caulk
  • Weight: 9.05 pounds
  • Dimensions: 12.3 x 8.2 x 6.2
  • Material: Co-polymer Rubber
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DAP INC 18152 Acrylic Latex Caulk
  • Weight: 1 pounds
  • Dimensions: 2 x 2 x 11.2
  • Color: White
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  Sashco Big Stretch Acrylic Latex
  • Weight: 11.7 pounds
  • Dimensions: 11.8 x 8.2 x 6.2
  • Material: Acrylic
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  Sashco 10016 Big Stretch Caulk
  • Weight: 13.6 ounces
  • Dimensions: 2 x 2 x 11.4
  • Material: big stretch
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  Dap 18110 Acrylic Latex Caulk
  • Weight: 1 pounds
  • Dimensions: 2 x 2 x 12
  • Color: Slate Gray
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Top 10 Picks for the Best Caulking for Shower Surround & Bathtubs Reviews

1. SashcoLexel Flexible Caulk

SashcoLexel Flexible Caulk - painters care

This caulk has an enormous amount of elasticity. If the surface that the SashcoLexel Flexible Caulk is applied to moves, then the caulk with the move as well. This eliminates complications from caulk drying to be rigid and tearing, cracking, or pulling away from the surface when the surface moves.

The minute that you apply this caulk you will have created a waterproof barrier. You do not have to wait for hours while the caulk dries, or wait to see if your caulk is going to stick and create a waterproof barrier. You instantly get a waterproof barrier when this is applied.

SashcoLexel flexible caulk resists both mold and mildew. You can count on it to deter these unsightly conditions from growing near your sink, shower, or tub.

This sealant continues to look good over time because it does not become cloudy or discolored as it ages. It also creates a tight seal that can be scrubbed and cleansed without worry of damaging the sealant.

You can use this best sealant on the majority of surfaces. Metal roof leaks, under your kitchen sink, around pipe connections, on swimming pools, and the list goes on and on. This is a great multi-purpose sealant that lets you end water leaks and seepage concerns forever.

2. DAP INC Acrylic Latex Caulk with Silicone

DAP INC Acrylic Latex Caulk for Shower Surround

With this acrylic latex caulk and a medium duty caulking gun you will be able to seal around windows, doors, and the corner joints of siding with ease. Your job will go quicker when you use this powerful sealant because once you have applied this sealant you only have to wait thirty minutes before painting it.

It is a high-quality sealant that creates a moisture and mildew resistant protective strip around all of your doors and windows in your home, your RV, or your camper trailer. You can use this sealant to stop water from leaking around windows, air conditioner units, door openings, and air ventilation spaces.

It is perfect for homeowner use and professional use as well. It has a low odor and all you need to clean up when you are finished is a little water. The sealant is white when it goes on and remains white after it dries so you can easily see if any sealant is in a place you do not wish for it to be.

It is rated for use on either interior or exterior surfaces and has a very low shrinkage amount. The low shrinkage will allow you to create a durable seal that you know will be 100% waterproof. That durable seal has a guarantee to last for 35 years.

3. Sashco Big Stretch Acrylic Latex High-Performance Caulking Sealant

Sashco Big Stretch Acrylic Latex Caulking Sealant

This flexible caulk will eliminate the need for you to be frequently making repairs around windows, doors, tubs, and corner trim because of caulking that became brittle and started to pull away from the surface or cracked. This flexible caulk will stay in place and look great because when the surface it is on moves a little the caulk has enough elasticity to move as well.

This caulk has such a fabulous amount of stretch-ability that it will stretch to 500% of its original size. That means it will stay where you put it without being compromised even when your house shifts, or when the wind moves your house a little. Your caulk will remain stable and on duty to keep the ugly water, creepy crawly insects,  and wind out of your home.

This caulk is a waterproof sealant that you can apply to permanently keep the nasty elements that Mother Nature has out of your home. This sealant will stop your heating and air conditioning from seeping out around windows and doors, and at the same time, it stops moisture and insects from creeping inside your home.

This sealant is paintable after it dries. You will not have to worry about anyone seeing the sealant or the sealant causing your home to look less attractive because once this substance dries all you have to do it paint it to match the surroundings it is in.

This can be used both indoors and outdoors effectively.

4. Sashco Big Stretch Caulk

Sashco Big Stretch Caulk for Bathtub

This caulk is manufactured in the United States. It is a durable sealant that can be used both inside and outside of your home to create protective barriers around windows, doors, floorboards, crown molding, exterior trim, and more. You can worry less about mold and mildew growing in your home when you have the small cracks sealed up with this stretchy caulk.

If you do not like bugs in your home then use this caulk around all of your interior trim prior to painting. The bugs will not be able to slip behind your trim boards and build their nests.

This sealant does not become rigid when it dries. It retains some flexibility so when your house shifts, and they all do, then your caulk will not pull away from the surface it was applied to. It stays where you put it and resists cracking that happens over time when caulk becomes dry and brittle.

This caulk has many useful purposes around your home but it is not recommended for use where water collects or puddles up. It does not need to be applied around a shower or tub, or around a swimming pool where it will be constantly immersed in water.

5. Dap Acrylic Latex Caulk With Silicone

Dap Acrylic Latex Caulk With Silicone

This sealant is perfect to use around the windows and door openings of your home. You can also use it around dryer vents, and attic vents that are in your siding. It has a 35-year durability guarantee so you will not have to replace it frequently.

This sealant is water resistant and one of the best silicone caulk for shower so it can stand the forces of rain that Mother Nature throws at the exterior of your home will not be able to enter your home. You will eliminate the worry of mold and mildew growing around openings into your home because this sealant will resist these unhealthy and ugly growths to keep your home more aesthetically pleasing and healthier to live in.

You can easily use this caulk inside your home because it has a low odor and does not offend your senses. It can also be cleaned up with plain water if you accidentally get any of the caulk in a place you do not wish for it to stay.

Once applied, the caulk will be set enough to be painted in about thirty minutes so your project will not take as long to complete as it would with some caulks that require a 24 to 36 hour drying time before they can be painted.

6. GE Silicone I All-Purpose Caulk

GE Silicone Caulk

This sealant is 100% waterproof because it is 100% silicone. Acrylic is a water-based sealant and through the years the water contained in acrylic will dry out and the acrylic will start to crumble, crack, and create gaps. 100% silicone will retain its flexibility because it does not dry out and you will not see cracks and crumbling sealant in a few years.

Silicone can withstand exposure to water better than acrylic so this is an ideal sealant for using on the interior or the exterior of your home. Once you have applied this sealer you can paint it in about half an hour and after 12 hours you can rest assured that it has become 100% waterproof.

Great for exterior weatherproofing around pipes, windows, doors, vents, trim, electric wires because it is permanently flexible and shrink proof. Acrylic sealants shrink by as much as 25% as they dry and age. Silicone does not dry so it retains its size and protective barrier wherever you place it.

It can adhere to wood, metal, vinyl siding, drywall, plaster, glass, and plastic so you can use it anywhere around your house with confidence.

7. GE Silicone 2+ Kitchen and Bath Caulk

GE Silicone Kitchen and Bath Caulk for Shower

This caulk is 100% waterproof in just thirty minutes after applications. If you are applying this sealant around a tub, or a sink you will not have to resist using the sink or tub for hours because thirty minutes after you put this sealant on a surface you will have created a waterproof barrier.

It is 100% silicone so it does not dry out and crack. It stays flexible so you can put it on metal, ceramic tiles, porcelain, granite, plastic, and wood surfaces knowing that if the material bends or moves the sealant will remain in place.

It works well in kitchens around sinks, countertops, and backsplashes, and in bathrooms around sinks, tubs, showers, and plumbing fixtures. It has a very low odor so it can be used in small rooms that do not have great ventilation like bathrooms. It also will not cause discoloration on chrome, nickel or bronze surfaces so it will not damage your plumbing fixtures.

This shower caulk to prevent mildew can be used in both wet and dry applications so if you have a leak yo simply cannot stop this sealant can still be applied to the wet surface and be depended on to adhere to the surface.

8. GE Supreme 100% Silicone Water-Ready caulk

GE Supreme Water-Ready caulk

This sealant has a lifetime guarantee. It is manufactured in the United States. It has a guarantee to remain mold and mildew-free for a period of 10 years. It is perfect for both indoor and outdoor use, and it is easy to apply.

30 minutes after you apply this sealant you will have created a waterproof barrier around your sink, shower, tub, or other surfaces you use it around. You can put it around your windows and door openings to stop water and bugs from coming into your home. It will also stop mildew and mold from getting a foothold around your tubs, shower stalls, and sinks in your bathroom, or kitchen.

It can be used around cast iron sinks that are popular in kitchens because it will adhere to that cast iron.

It dries white and retains flexibility so when countertops give a little the sealant will not pull away or crack. This flexibility allows you to be sure that you will not have to apply a new caulk layer every couple of years.

It is not a paintable caulk.

9. Dap Bathroom Silicone Rubber Caulk

Dap Bathroom Silicone Rubber Caulk

This 100% silicone caulk was specially designed to be used in bathrooms, kitchens, laundry rooms, and mud rooms in your home. It can be placed around ceramic tiles, plumbing fixtures, tubs, showers, sinks, and other items to create a flexible waterproof barrier.

It will seal non-porous surfaces and stop things like insects from coming in around plumbing, it can stop water from leaking around your sink and dripping under your sink where it can cause a mold and mildew problem, and it can make a secure seal around window openings and door casings so air from inside your home does not escape and increase your heating and cooling costs.

It has a 50-year durability guarantee from the manufacturer. It retains flexibility so it will not become brittle with age and start to crack and disintegrate. It can also move a little so when your house shifts it will not cause the caulk to pull away from the area it was applied to.

This caulk is white when it is applied and it remains white. It is easy to apply and great for homeowners and professionals.

10. General Electric Kitchen and Bath Silicone Caulk

General Electric Kitchen and Bath Silicone Caulk

This is a 100% silicone substance that will retain its flexibility over time unlike acrylic caulks that dry out and later crack or pull away from the surface they were applied to and leave unsightly gaps that moisture and insects can infiltrate.

This silicone caulk remains 100% waterproof so it can be used in areas where a lot of water is used. You can use it around your tub, your shower, your plumbing fixtures, your sinks, your door casings, your window casings, and more. The caulk will create a barrier that will not allow water from a faucet to drain behind your tiles and cause mold or mildew to grow or worse cause damages to the wooden framing of your home.

This caulk adheres to ceramic tile, laminate, porcelain, glass, metal, plastic, granite and wood so you can use it anywhere around your home, on the exterior, or on the interior.

Creating seals around doors and windows will effectively reduce the amount you spend on heating and cooling. It will also reduce the opportunities insects and bugs like roaches and spiders have to enter your home.

11. Loctite Polyseamseal Tub and Tile Adhesive Caulk

Loctite Polyseamseal Tub  Adhesive Caulk

This caulk was designed to be used to seal around tubs, sinks, shower stalls, tile, and plumbing fixtures. It can adhere to fiberglass composites, stainless steel, wood, most plastics, aluminum, enamel, wallboard, porcelain, glass.

Once you apply this sealant it will always remain pliable and flexible. You will not have to worry about the moisture evaporating from the sealant and causing it to dry and start to crumble in a few years. This flexibility will allow you to place this around countertops and know that slight movements of the tops will not cause the seal formed by this caulk to break.

This sealant contains mildewcide to resist mold and mildew growth. Mold and mildew both like to grow in damp dark areas like under kitchen sinks, behind ceramic backsplashes and behind shower and tub enclosures. The powerful mildewcide in this product will deter mildew and mold from growing so your house remains cleaner and healthier.

This product is very easy to apply and even a novice can use this and create an attractive seal around their tubs, showers, and more.

Different Types of Bathroom Caulks


Before you put a caulking sealant around your shower stall or bathtub you should make yourself familiar with which types of sealants are acceptable for those applications. You do not want to take the time to put caulk around your shower and then discover that the caulk is not waterproof or mildew resistant.

Vinyl Latex

Vinyl latex caulk is not water soluble so you can use it wet areas like around tubs and showers. It has its drawbacks because it is not very flexible so it should not be used in any area where you expect expansion or contraction to occur.

Acrylic tile sealant

This is great for making small patch repairs in locations that are wet or are hard to get perfectly dry. It is paintable and easy to clean up, but when used around showers or tubs it does not seem to last very long.

100% silicone

This sealant is flexible and will not dry out or crack. If there is an expansion or contraction of the material it is applied to this sealant will still adhere perfectly without pulling away, cracking, or crumbling. It is generally mold and mildew resistant and it lasts for a long time.

It has its drawbacks in the fact that it is not really easy to clean up, as a matter of fact, it can be a nightmare if you get it on something and want to remove it. It has a foul odor and it does not adhere well to wood, drywall or any porous surface.

Dap VS GE Silicone Caulk

Dap and GE are two well-known manufacturers of caulk and silicone sealants. Is one of these brands better than the other?

Dap Silicon Caulk Pros

  • The clear variety goes on white and dries clear so you can easily see where the caulk has been applied
  • Retains flexibility, does not crack with age
  • Less expensive
  • Waterproof
  • Long lasting
  • Will adhere to most materials
  • Can be used indoors and outdoors
  • Can withstand high and low temperatures
  • Can be used in bathrooms around tubs, showers, sinks, plumbing fixtures, and ceramic tiles,
  • Can be used in kitchens around sinks, backsplashes, ceramic tiles, fixtures
  • Can be used around doors and windows, vents, and trim

Dap Silicon Caulk Cons

  • The additive that causes the clear caulk to be white when applied and dry to clear also causes the sealant to shrink more and stops you from being able to paint the caulk for at least seven days
  • May not be mildew resistant so read the label carefully
  • Has a pretty bad odor

GE Silicone Caulk Pros

  • Comes with a mildew resistant agent in it so it stops mold and mildew from growing on surfaces
  • Flexible does not crack with age
  • Waterproof
  • Long lasting
  • Low odor
  • Adheres to most common surfaces
  • Can be used on the exterior or interior of homes
  • Can withstand high and low temperatures
  • Can be used in bathrooms around tubs, showers, sinks, plumbing fixtures, and ceramic tiles,
  • Can be used in kitchens around sinks, backsplashes, ceramic tiles, fixtures
  • Can be used around doors and windows, vents, and trim

GE Silicone Caulk Cons

  • Cost more than Dap
  • Hard to clean up

Silicone Caulk vs Acrylic Caulk


There are a lot of different caulk types, but two of the main caulk varieties are silicone and acrylic. Each of these sealants has qualities that make them desirable, and they each have some drawbacks as well.

Silicone Caulk Pros

  • Silicone remains waterproof
  • Silicone can remain flexible
  • Silicone is 100% waterproof
  • Silicone does not crumble with age
  • Clear silicone does not generally yellow over time
  • Cures quickly

Silicone Caulk Cons

  • Hard to clean up if you get it in an area where you do not want it
  • More expensive than acrylic
  • Requires more skill to apply

Acrylic Caulk Pros

  • Inexpensive
  • Cleans up easily with just water
  • Has less of an odor
  • Easy to apply

Acrylic Caulk Cons

  • Acrylic is water based so it dries and cracks as the water evaporates from it
  • Acrylic can freeze at low temperatures
  • Acrylic hardens and deteriorates when exposed to sunlight and extreme heat variations
  • Acrylic will break down in water over time
  • Acrylics can shrink as much as 25%

Read Our Latex caulk vs Silicone caulk comparison post to know more

So, Why is a Shower Caulk Essential?

Most of us know that we are supposed to caulk around our showers and tubs, but some people do not know the reasons why this is done.

Shower caulk is an essential item because:

  • The caulk seals around the shower stall so that water used in the shower cannot leak out and get to the drywall or framing that is located behind the shower. If the water gets behind these surfaces it can cause the drywall or the wood framing to rot over time
  • Shower caulk stops water from getting under the shower and causing the flooring to become rotten
  • Shower caulk stops the water from getting behind the shower surface and reduces the ability of mold and mildew to become established and grow behind your shower. It helps your home to stay healthier to live in
  • Shower caulk stops insects that love water, like roaches, silverfish, and some ants, from being able to get to your shower for a drink
  • Shower caulk can stop shower fixtures from leaking water

Frequently Asked Questions about Shower Caulk 

How long does caulk need to dry before showering?

Each caulk has a different drying time so you need to read the label on your caulk tube. The least amount of drying time is usually 30 minutes and most are 7 days.

How do you clean shower caulk?

Your shower caulk can be cleaned with whatever cleanser you use to clean your shower.

What is the fastest way to cure caulking?

The fastest way to cure caulk is to apply it when the air temperature is above 750 and there is little to no humidity or moisture in the air.

How do you prevent mold in shower caulking?

The best way to prevent mold growth on shower caulk is to buy a caulk that is mold and mildew resistant. They have mildewcide in them to retard these fungi growths.

Is it okay to apply a new caulk over an existing one?

You need to remove the old caulking so that you get proper installation and seal with your new caulk.

What is the difference between caulk and sealant?

The flexibility they have is the main difference. Caulk usually dries to be hard and rigid where sealants usually retain some flexibility.

Final Word Caulk for Showers

When you get ready to put a best caulking for shower around your tub or shower it is best for you to purchase an item that is 100% waterproof and that is mold and mildew resistant.

You will need to purchase a caulking gun that the tube of caulk fits into so that you can apply these substances. When you are through using caulk if the tube is not empty you can push a screw or nail into the opening of the caulk tube to keep the substance from oozing out.

Caulk and sealant are perishable and usually, you cannot keep them for more than a few months before they will start to thicken and harden inside their containers.

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